Cruz will play YouTube videos with the Skyfire App installed.
Cruz also has a a preloaded app that can manage all of his email accounts.
The Cruz reader is somewhat limited memory wise for videos... it will play them, but the 250mb of RAM seem to be barely enough.
The Cruz Tablet has 512mb RAM and would probably support video better.
That being said, I'm getting by just fine with the Cruz reader for videos (just have to make sure no other apps are running in the background!).